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## Homework Statement

A spring is hung from the ceiling. A 0.450-kg block is then attached to the free end of the spring. When released from rest, the block drops 0.150 m before momentarily coming to rest. (a) What is the spring constant of the spring? (b) Find the angular frequency of the block’s vibrations.

## Homework Equations

Ei = Ef

[tex]\omega[/tex] = sqrt (k/m)

## The Attempt at a Solution

I cant figure out how to find part A. I know that once I find that I take that value and plug it into equation 2 to solve for the angular frequency.